This is a set of all 20 volumes, offered in three separate shipments. This item is exclusively for those who purchase the complete set. Thank you for your understanding. Published in 1974, all volumes are first editions, first printings. Includes the supplement "Kotoba no Mado" (Word Window). Stored in a glass-doored bookshelf in my parents' home library. It's likely they were hardly opened after purchase, just displayed on the shelf. The text is remarkably clean, considering it's been over 50 years since publication. The cases show some age-related wear, and some volumes have slight staining on the top, bottom, and side edges. As it's not possible to check every page, please understand that this is a casual inspection before purchasing.